Inverse polymerase chain reaction (Inverse PCR) is a variant of the polymerase chain reaction that is used to amplify DNA with only one known sequence. One limitation of conventional PCR is that it requires primers complementary to both termini of the target DNA, but this method allows PCR to be carried out even if only one sequence is available from which primers may be designed.
Summary of the inverse PCR process.
Inverse PCR is especially useful for the determination of insert locations. For example, various retroviruses and transposons randomly integrate into genomic DNA.[1] To identify the sites where they have entered, the known, "internal" viral or transposon sequences can be used to design primers that will amplify a small portion of the flanking, "external" genomic DNA. The amplified product can then be sequenced and compared with DNA databases to locate the sequence which has been disrupted.
The inverse PCR method involves a series of restriction digests and ligation, resulting in a looped fragment that can be primed for PCR from a single section of known sequence. Then, like other polymerase chain reaction processes, the DNA is amplified by the thermostable DNA polymerase:
A target region with an internal section of known sequence and unknown flanking regions is identified
Genomic DNA is digested into fragments of a few kilobases by a usually low-moderate frequency (6-8 base) cutting restriction enzyme.
Under low DNA concentrations or quick ligation conditions, self-ligation is induced to give a circular DNA product.
PCR is carried out as usual with the circular template, with primers complementary to sections of the known internal sequence pointing outwards.
Finally the sequence of the sequenced PCR product is compared against sequence databases. It is used in case of chromosome crawling.
Referencesedit
^Ochman, H.; Gerber, A. S.; Hartl, D. L. (1988-11-01). "Genetic applications of an inverse polymerase chain reaction". Genetics. 120 (3): 621–623. doi:10.1093/genetics/120.3.621. ISSN 0016-6731. PMC1203539. PMID 2852134.
inverse, polymerase, chain, reaction, this, article, includes, list, general, references, lacks, sufficient, corresponding, inline, citations, please, help, improve, this, article, introducing, more, precise, citations, april, 2012, learn, when, remove, this, . This article includes a list of general references but it lacks sufficient corresponding inline citations Please help to improve this article by introducing more precise citations April 2012 Learn how and when to remove this message Inverse polymerase chain reaction Inverse PCR is a variant of the polymerase chain reaction that is used to amplify DNA with only one known sequence One limitation of conventional PCR is that it requires primers complementary to both termini of the target DNA but this method allows PCR to be carried out even if only one sequence is available from which primers may be designed Summary of the inverse PCR process Inverse PCR is especially useful for the determination of insert locations For example various retroviruses and transposons randomly integrate into genomic DNA 1 To identify the sites where they have entered the known internal viral or transposon sequences can be used to design primers that will amplify a small portion of the flanking external genomic DNA The amplified product can then be sequenced and compared with DNA databases to locate the sequence which has been disrupted The inverse PCR method involves a series of restriction digests and ligation resulting in a looped fragment that can be primed for PCR from a single section of known sequence Then like other polymerase chain reaction processes the DNA is amplified by the thermostable DNA polymerase A target region with an internal section of known sequence and unknown flanking regions is identified Genomic DNA is digested into fragments of a few kilobases by a usually low moderate frequency 6 8 base cutting restriction enzyme Under low DNA concentrations or quick ligation conditions self ligation is induced to give a circular DNA product PCR is carried out as usual with the circular template with primers complementary to sections of the known internal sequence pointing outwards Finally the sequence of the sequenced PCR product is compared against sequence databases It is used in case of chromosome crawling References edit Ochman H Gerber A S Hartl D L 1988 11 01 Genetic applications of an inverse polymerase chain reaction Genetics 120 3 621 623 doi 10 1093 genetics 120 3 621 ISSN 0016 6731 PMC 1203539 PMID 2852134 Portal nbsp Biology Retrieved from https en wikipedia org w index php title Inverse polymerase chain reaction amp oldid 1189419262, wikipedia, wiki, book, books, library,
